Ribbon in ASP.NET MVC Spreadsheet control

@Html.EJS().Spreadsheet("spreadsheet").Created("created").FileMenuBeforeOpen("fileMenuBeforeOpen").FileMenuItemSelect("fileMenuItemSelect").Sheets(sheet =>
{
    sheet.Range(ranges =>
    {
        ranges.DataSource((IEnumerable<object>)ViewBag.defaultData).StartCell("A1").Add();
    }).Columns(column =>
    {
        column.Width(180).Add();
        column.Width(130).Add();
        column.Width(130).Add();
        column.Width(180).Add();
        column.Width(130).Add();
        column.Width(120).Add();
    }).Add();
}).Render()

<script>
   
    function created() {
        this.cellFormat({ fontWeight: 'bold', textAlign: 'center' }, 'A1:F1');
        // Hiding the `Insert` from ribbon.
        this.hideRibbonTabs(['Insert']);
        // Set disabled state to `View` ribbon tab.
        this.enableRibbonTabs(['View'], false);
        // Adding the `Help` ribbon tab at the last index.
        // Specify the ribbon tab header text in last optional argument(`insertBefore`) for inserting new tab before any existing tab.
        this.addRibbonTabs([{ header: { text: 'Help' }, content: [{ text: 'Feedback', tooltipText: 'Feedback',
            click: (args) => { /* Any click action for this toolbar item will come here. */ } }] }]);
        // Hiding the unwanted toolbar items from `Home` by specifying its index.
        this.hideToolbarItems('Home', [0, 1, 2, 4, 14, 15, 21, 24]);
        // Set disable state to `Underline`, 'Wrap text` toolbar items from `Home` by specifying the item id.
        this.enableToolbarItems('Home', [`${this.element.id}_underline`, `${this.element.id}_wrap`], false);
        // Set disable state to `Protect Sheet` toolbar item from `Data` by mentioning its index.
        this.enableToolbarItems('Data', [0], false);
        // Adding the new `Custom Formulas` toolbar item under `Formulas` tab for adding custom formulas.
        this.addToolbarItems(
            'Formulas', [{ type: 'Separator' }, {
                text: 'Custom Formulas', tooltipText: 'Custom Formulas',
                // You can set click handler for each new custom toolbar item
                click: (args) => {
                    // You can add custom formulas here.
                }
            }]);
        // Adding new custom item `Import` after the existing `Open` item. By default, new item will add after the specified item.
        this.addFileMenuItems([{ text: 'Import', iconCss: 'e-open e-icons' }], 'Open');
        // Adding new custom item `Export As` after the existing `Save As` item.
        // Set `insertAfter` optional argument as `false` for adding new item before the specified item.
        this.addFileMenuItems(
            [{
                text: 'Export As', iconCss: 'e-save e-icons', items: [{ text: 'XLSX', iconCss: 'e-xlsx e-icons' },
                    { text: 'XLS', iconCss: 'e-xls e-icons' }, { text: 'CSV', iconCss: 'e-csv e-icons' }]
            }],
            'Save As', false);
    }
    function fileMenuBeforeOpen() { // Because the file menu items are created dynamically, you need to perform the hide or show and enable/disable operations
        // under filemenu before open event.
        // Hiding the `Save As` and `Open` item.
        this.hideFileMenuItems(['Save As', 'Open']);
         // Set disable state to `New` item. You can perform any file menu items customization by specifying the item id,
        // if it has more than one same item text. Set the last argument `isUniqueId` as true for using the item id.
        this.enableFileMenuItems([`${this.element.id}_New`], false, true); }

    function fileMenuItemSelect(args) {
    // Custom file menu items select handler
        switch (args.item.text) {
            case 'Import': select(`#${this.element.id}_fileUpload`, this.element).click();
                break;
            case 'XLSX': this.save({ saveType: 'Xlsx' });
                break;
            case 'XLS': this.save({ saveType: 'Xls' });
                break;
            case 'CSV': this.save({ saveType: 'Csv' });
                break;
        }}

</script>

public IActionResult Index()
        {
           List<object> data = new List<object>()
            {
                new { CustomerName= "Romona Heaslip",  Model= "Taurus",  Color= "Aquamarine",  PaymentMode= "Debit Card",  DeliveryDate= "07/11/2015",  Amount= "8529.22" },
                new { CustomerName= "Clare Batterton",  Model= "Sparrow",  Color= "Pink",  PaymentMode= "Cash On Delivery",  DeliveryDate= "7/13/2016",  Amount= "17866.19" },
                new { CustomerName= "Eamon Traise",  Model= "Grand Cherokee",  Color= "Blue",  PaymentMode= "Net Banking",  DeliveryDate= "09/04/2015",  Amount= "13853.09" },
                new { CustomerName= "Julius Gorner",  Model= "GTO",  Color= "Aquamarine",  PaymentMode= "Credit Card",  DeliveryDate= "12/15/2017",  Amount= "2338.74" },
                new { CustomerName= "Jenna Schoolfield",  Model= "LX",  Color= "Yellow",  PaymentMode= "Credit Card",  DeliveryDate= "10/08/2014",  Amount= "9578.45" },
                new { CustomerName= "Marylynne Harring",  Model= "Catera",  Color= "Green",  PaymentMode= "Cash On Delivery",  DeliveryDate= "7/01/2017",  Amount= "19141.62" },
                new { CustomerName= "Vilhelmina Leipelt",  Model= "7 Series",  Color= "Goldenrod",  PaymentMode= "Credit Card",  DeliveryDate= "12/20/2015",  Amount= "6543.30" },
                new { CustomerName= "Barby Heisler",  Model= "Corvette",  Color= "Red",  PaymentMode= "Credit Card",  DeliveryDate= "11/24/2014",  Amount= "13035.06" },
                new { CustomerName= "Karyn Boik",  Model= "Regal",  Color= "Indigo",  PaymentMode= "Debit Card",  DeliveryDate= "05/12/2014",  Amount= "18488.80" },
                new { CustomerName= "Jeanette Pamplin",  Model= "S4",  Color= "Fuscia",  PaymentMode= "Net Banking",  DeliveryDate= "12/30/2014",  Amount= "12317.04" },
                new { CustomerName= "Cristi Espinos",  Model= "TL",  Color= "Aquamarine",  PaymentMode= "Credit Card",  DeliveryDate= "12/18/2013",  Amount= "6230.13" },
                new { CustomerName= "Issy Humm",  Model= "Club Wagon",  Color= "Pink",  PaymentMode= "Cash On Delivery",  DeliveryDate= "02/02/2015",  Amount= "9709.49" },
                new { CustomerName= "Tuesday Fautly",  Model= "V8 Vantage",  Color= "Crimson",  PaymentMode= "Debit Card",  DeliveryDate= "11/19/2014",  Amount= "9766.10" },
                new { CustomerName= "Rosemaria Thomann",  Model= "Caravan",  Color= "Violet",  PaymentMode= "Net Banking",  DeliveryDate= "02/08/2014",  Amount= "7685.49" },
            };
            ViewBag.DefaultData = data;
            return View();
        }